Method of recognizing communication signal modulation mode based on feature extraction
A modulation method and communication signal technology, applied in the field of communication, can solve the problem of signal-to-noise ratio reduction
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[0058] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0059] The English abbreviations involved are as follows:
[0060] AM Amplitude Modulation
[0061] FM frequency modulation
[0062] CW single carrier
[0063] ASK amplitude keying
[0064] MFSK M-ary frequency shift keying
[0065] BPSK binary phase shift keying
[0066] QPSK quadrature phase shift keying
[0067] π / 4-QPSK π / 4 phase-shifted QPSK
[0068] OQPSK Offset Quadrature Phase Shift Keying
[0069] MQAM M-ary quadrature amplitude modulation
[0070] A method for identifying a communication signal modulation mode based on feature extraction, comprising the steps in the following sequence:
[0071] 1) First, perform median filtering on the received signal, use the signal obtained by median filtering to estimate the bandwidth, and perform linear filtering o...
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